WALDRON eMisiNcERING & CONSTRUCTION. INC.
. To: William Keating, P.E., Project Engineer, Nashua Wastewater Treatment Facility
From: Jeremy P. Smith, P.E., Waldron Engineering & Construction, Inc.
Date: July 9 , 2020
Re: Change Order Request Review 025
NWWYTF Energy Recovery Upgrade Project
Attachments: Methuen Construction PCO-025 Fuel train re-build
Mr. Keating:
Waldron has compiled its review based on review of the Owner’s documentation (design
documents, OEM submittals, submittal reviews, RFI responses, and project notes) and the
Contractor’s documentation (RFI’s, Submittals, Reports, issued Change Orders). Specifically;
Waldron has reviewed the issue of additional work associated with the installation of the jacket
water booster pumps. Methuen has previously submitted for the related electrical scope of work.
Summary Review
Original Schedule Schedule Direct Schedule Schedule Claim
Adjustment claim Impact Assessment Recommended
None 10 0 0
Original Cost Cost Adjustment Direct Cost Impact Cost Adjustment
elaim Assessment Recommended
None $2,743.06 $2,743 $2,743
Detailed Review-Base Cost Validity
Methuen has made a claim for the work as required based on RFI responses, submittal reviews
aud Field conditions. The claim is based on their work and their subcontractor’s work resulting
from the above. Waldron has reviewed the design documents, OEM submittals, submittal
reviews, and RFI responses regarding this issue. Waldron has relied on vendor quotes, project
cost estimations, historical project data, RS Means, and its own proprietary cost data to review the
cost validity of the work scope.
The submitted PCO is based on additions to the work encountered in the field around a
tequirement from CAT to accommodate fuel train components of mis-sized (not all one
corresponding size) into a single assembly, While the fuel tian components were listed as a ship
loose item, it is not reasonable that the contractor would understand that those pieces of
equipment would be mis-szied. We also note that CAT was requested to reduce their fuel train
pressure drop to accoiadate the operating profile of the blending skid, and this lead to revised fuel
train component selctions, which were not all available in a full menu of sizes, which elad to the
mis-matched sizes (i.e. it was not logistically feasible to get every component in 2 4")
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